JANTX1N4993D

Single Zener Diodes Overview

The JANTX1N4993D is a single Zener diode manufactured by Microchip Technology, designed for high-reliability applications. It features a nominal Zener voltage of 300 V with a tight tolerance of ±1%. The device is rated for a power dissipation of 5 W and utilizes an E-Axial through-hole package. Key electrical parameters include a maximum reverse leakage current of 2 µA, a Zener impedance (Zzt) of 950 Ohms, and a maximum forward voltage of 1.5 V. It operates within a junction temperature range of -65°C to +175°C.

Single Zener Diodes Feature Summary

• High-precision voltage regulation with ±1% tolerance
• Robust 5 W power handling capability
• Extended thermal operation up to 175°C
• Rad-hardened construction for harsh environments

Single Zener Diodes Applications

• Military aerospace power supplies
• Radiation-tolerant electronic circuits
• High-voltage reference standards
• Spacecraft protection systems

Single Zener Diodes Procurement Notes

Verify the specific lot charge designation when ordering, as military-grade components often require traceability documentation. Confirm that the procurement channel provides necessary quality certifications such as MIL-PRF-19500 compliance. Ensure the receiving facility handles electrostatic discharge precautions appropriate for sensitive semiconductor devices. Cross-reference the manufacturer part number with official Microchip databases to confirm current production status and availability before finalizing purchase orders.

Single Zener Diodes Selection Notes

Select this component when strict voltage accuracy and radiation hardness are required in high-power axial packages. The 300 V rating suits high-voltage regulation tasks where standard commercial parts would fail. Consider the 5 W dissipation limit for thermal management design. Verify that the E-Axial form factor fits the target PCB or chassis mounting constraints. Compare against lower-tolerance alternatives if cost is a primary driver, though reliability requirements usually dictate this specific grade.

Single Zener Diodes Part Context

This part belongs to the JANTX series of Zener diodes, which are qualified under MIL-PRF-19500 specifications. The 'JAN' indicates Military Grade, while 'TX' denotes a specific screening level offering enhanced reliability over standard JAN parts. These diodes are typically used in defense and space applications where failure is not an option. The series shares common packaging and basic electrical characteristics but varies in voltage ratings.

Single Zener Diodes Replacement Considerations

Direct substitutes must match the 300 V Zener voltage, 5 W power rating, and ±1% tolerance. Check for equivalent MIL-PRF-19500 qualified parts from other authorized manufacturers. Ensure the replacement maintains the same E-Axial package dimensions for mechanical compatibility. Verify that any alternative meets the same radiation hardness levels if operating in space or high-altitude environments.